US4486179A
Expired / Lapsed
US
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Biocompatible cementitious dental compositions
Assignee: United States Department of Health and Human Services
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Filing: 1984-02-23
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Granted: 1984-12-04
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Expires: 2004-02-23
Abstract
Abstract Dental cements with syringate esters such as 2-ethylhexyl syringate with or without vanillate esters dissolved in o-ethoxybenzoic acid as ingredients of the liquid when mixed with metal oxide powder yield rapid setting, insoluble cements that have high strength, do not inhibit free radical polymerization, adhere strongly to metal, and reduce carries. Use of silanized glass filler to the powder in conjunction with the addition of monomer to the liquid gives an even stronger cement.
Inventors
- 👤 Gerhard M. Brauer
- 👤 Jeffrey W. Stansbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:00
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/70; A61K6/71; A61K6/77; A61K6/20; A61K6/30; A61K6/50; A61K6/54; A61K6/80; A61K6/849; A61K6/876; A61K6/884; A61K6/887; A61K6/889
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
100 words
In a cementitious dental composition comprising a solid phase which includes a metal oxide or hydroxide of a Group II metal or tin and a liquid phase which includes a chelating compound, said chelating compound comprising an ester containing at least one vanillyl group, said ester being the product of a reaction of an alcohol and at least one of a member selected from the group consisting of vanillic acid, isomers of vanillic acid, and homologs of vanillic acid, or other molecules containing vanillyl groups, the improvement comprising a syringic acid ester in an amount sufficient to inhibit caries formation.
Claim 2
Dependent Claim
100 words
In a cementitious dental composition comprising a solid phase which includes a metal oxide or hydroxide of a Group II metal or tin and a liquid phase which includes a chelating compound, said chelating compound comprising an ester containing at least one vanillyl group, said ester being the product of a reaction of an alcohol and at least one of a member selected from the group consisting of vanillic acid, isomers of vanillic acid, and homologs of vanillic acid, or other molecules containing vanillyl groups, the improvement comprising a syringic acid ester in an amount sufficient to inhibit caries formation.
Claim 3
Dependent Claim
11 words
The cementitious dental composition of claim 1, further comprising a solvent.
Claim 4
Dependent Claim
15 words
The cementitious dental composition of claim 1, further comprising a silanized glass powder as filler.
Claim 5
Dependent Claim
20 words
The cementitious dental composition of claim 1, wherein the alcohol moiety of the syringic acid ester is n-hexyl or 2-ethylhexyl.
Claim 6
Dependent Claim
14 words
The cementitious dental composition of claim 2, wherein said solvent is a chelating agent.
Claim 7
Dependent Claim
14 words
The cementitious dental composition of claim 5, wherein said chelating agent is o-ethoxybenzoic acid.
Claim 8
Dependent Claim
27 words
The cementitious dental composition of claim 2, further comprising a liquid vanillate ester which serves as said solvent and as said ester of the vanillic acid moiety.
Claim 9
Dependent Claim
28 words
The cementitious dental composition of claim 1, wherein said liquid phase consists essentially of about 5% to ethylhexyl syringate, about 7% n-hexyl vanillate and about 88% o-ethoxybenzoic acid.
Claim 10
Dependent Claim
14 words
The cementitious dental composition of claim 1, wherein said composition further comprises a polymer.
Claim 11
Dependent Claim
31 words
The cementitious dental composition of claim 9, wherein said polymer is present in said composition in an amount between 1 and 20% by weight, based on the weight of said composition.
Claim 12
Dependent Claim
25 words
The cementitious dental composition of claim 1, wherein said composition additionally contains a monomer polymerizable by a free radical mechanism, a polymerization initiator and accelerator.
Claim 13
Dependent Claim
39 words
The cementitious dental composition of claim 3, wherein said liquid phase further comprises o-ethoxybenzoic acid, an inhibited methacrylate monomer, an initiator and accelerator, and said solid phase comprises a powder containing zinc oxide and aluminum oxide and hydrogenated rosin.
Claim 14
Dependent Claim
15 words
The cementitious dental composition of claim 12, wherein said inhibited methacrylate monomer is a mono-methacrylate.
Claim 15
Dependent Claim
21 words
The cementitious dental composition of claim 12, wherein said inhibited methacrylate monomer comprises a high molecular weight monomer of low volitility.
Claim 16
Dependent Claim
65 words
The cementitious dental composition of claim 12, wherein said liquid phase comprises up to one part of mixture of said vanillate ester with said o-ethoxybenzoic acid to one part of said inhibited methacrylate monomer; and said solid phase comprises approximately one part of a mixture of said zinc oxide with said aluminum oxide and said hydrogenated rosin, to one part of said silanized glass powder.
Claim 17
Dependent Claim
24 words
The cementitious dental composition of claim 14 wherein said inhibited methacrylate monomer is cyclohexyl methacrylate or dicyclopentenyloxyethyl methacrylate with or without a monomeric diluent.
Claim 18
Dependent Claim
27 words
The cementitious dental composition of claim 12 wherein said accelerator is a tertiary aromatic amine containing no acetic groups such as N,N-dihydroxyethyl-p-toluidine or a dialkylaminophenylacetic acid ester.
Claim 19
Dependent Claim
21 words
The cementitious dental composition of claim 1, wherein said liquid phase contains about 10-30% n-hexyl syringate and about 90-70% o-ethoxybenzoic acid.
Claim 20
Dependent Claim
19 words
A restored dental element comprised of porcelain or porcelain to metal cemented together by the composition of claim 1.
Claim 21
Dependent Claim
47 words
A cementitious dental composition comprising a solid phase which includes a metal oxide or hydroxide of a Group II metal or tin and a liquid phase which includes a chelating compound, said chelating compound comprising a syringic acid ester in an amount sufficient to inhibit caries formation.
Claim 22
Dependent Claim
47 words
A cementitious dental composition comprising a solid phase which includes a metal oxide or hydroxide of a Group II metal or tin and a liquid phase which includes a chelating compound, said chelating compound comprising a syringic acid ester in an amount sufficient to inhibit caries formation.
Claim 23
Dependent Claim
15 words
The cementitious dental composition of claim 20, further comprising a silanized glass powder as filler.
Claim 24
Dependent Claim
14 words
The cementitious dental composition of claim 20, wherein said composition further comprises a polymer.
Claim 25
Dependent Claim
31 words
The cementitious dental composition of claim 22, wherein said polymer is present in said composition in an amount between 1 and 20% by weight, based on the weight of said composition.
Claim 26
Dependent Claim
25 words
The cementitious dental composition of claim 20, wherein said composition additionally contains a monomer polymerizable by a free radical mechanism, a polymerization initiator and accelerator.
Claim 27
Dependent Claim
23 words
The cementitious dental composition of claim 20, wherein said liquid phase consists essentially of about 10-30% n-hexyl syringate and about 90-70% o-ethoxybenzoic acid.
Claim 28
Dependent Claim
18 words
A restored dental element of porcelain or porcelain to metal cemented together by the composition of claim 20.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |